I've already written an extension that filters these comments intelligently. (E.g., quotes are ignored but if the rest of the body is all lowercase it is collapsed.)

have you shared it anywhere?

I plan to at some point, it's part of a bigger extension I created for myself to filter out minor annoyances and I'd have to strip out/modify things other people probably wouldn't want (such as filtering of "new age" TLDs like ".pizza" and whatnot).